Paper-pulp dressing and evening device.



Patented Mar. 13, I900.

H. anon. PAPER PULP DRESSING AND EVENING DEVICE.

I (Application filed Apr. 7, 1899.)

2 Sheets-Sheet (No Model.)

No. 645,422. Patented Mar. I3, I900. H. MELLUR. PAPER PDLP DRESSING AND EVENING DEVICE.

(Application filed Apr. 7, 1899.) (No Model.) 2 Sheets-Sheet 2.

Nr'rs TATES HENRYMELLOR, OF HOLYOKE, MASSACHUSETTS.

PAPER-PULP DRESSING AND EVENING DEVICE.

SPECIFICATION forming part of Letters Patent No. 645,422, dated. March 13, 1900. Application filed April 7, 1899. Serial IIOI 712,123. (No model.)

T at whom, it may concern:

Be it knownthat I, HENRY MELLOR, a subj ect of the Queen of Great Britain, residing at I-Iolyoke, in the county of Hampden and State of Massachusetts, have invented new and useful Improvements in Paper- Pulp Dressing and Evening Devices, of which the following is a specification.

This invention relates to paper-making machines, the object being to provide for operation in connection with said machines improved pulp eveningor dressing devices adapted to act upon the pulp between the pulpscreens and the Fourdrinier wire-cloth of the I 5 paper-making machine to prevent the delivery upon said wire-cloth of the paper-machine of any accumulation or bunches of pulp,which in the completed paper will appear as more or less thickened dark-colored spots in said paper and sometimes under the effect of the pressure of calendering or other rolls will work perforations or thin spots in the paper, thereby seriously damaging the latter; and the invention consists in interposing suitable devices between said screens and the papermachine which so act upon the paper-pulp while moving from the said screens onward to the machine that all bunch-like collections and accumulations of parts of the pulp are destroyed and are reduced to the consistency of the main body of the pulp, so that the delivery thereof to the paper-machine consists of a clear mat of pulp of equal thickness and free from any of said objectionable bunchlike collections and said damage to and cono fication, Figure l is a vertical sectional view between the ends of a'pulp-receiving box containing devices for acting upon paper-pulp prior to the delivery of the latter onto a paper-machine constructed according to my invention, said figure showing a portion of a paper-machine adjacent to the pulp-delivery spout of said box, the latter showing an inlet thereon through which pulp is'received from the pulp-screens. Fig. 2 is a vertical sectional view of said pulp-receiving box near one side thereof, showing cylinders in side elevation therein for action upon pulp passing therethrough.

Referring to the drawings, A indicates a portion of the end of the frame of a paper'- making machine, and B a section of the supporting-roll over which the Fourdrinier wirecloth runs at or near said end. D indicates a suit-able box for receiving wet paper-pulp from the ordinary pulp-screens, a portion of one of which is indicated by S, through v which the pulp passes before it is delivered onto said paper-machine, and E indicates a portion of a pipe connection between said box and screens, through which the pulp may flow into said box D. F indicates a spout connected with a part D of said box, through which'the pulp flows from the latter onto the said paper-machine in the direction indicated by the arrows m, Fig. 1. The level of the bottom of the spout F is, as in all machines of this class, somewhat below the level of the overflow from the screen-boxes, and as this overflow is conducted to the bottom of the box D through the pipe E it follows that the pulp and Water will flow up through the said box D without assistance from the revolving rolls, the revolutions of which, as will be described farther on, serving, however, to give a certain circuitous direction to the course of the pulp passing through the box D. It is well known that paper-pulp has a tendency to ball up during the refining process thereof, and this invention provides means for brushing out anyof said pulp balls or bunches as may pass through the screens before the pulp flows onto the Wire of the paper-machine, thereby insuring a more perfect product. The above-referred-to devices which act upon the paper-pulp, as aforesaid, while moving from the screens to the paper-machine are located within said box D and comprise the belowdescribed devices, which are located in and attached to the sides of said last-named box. Several rolls F F F, (three being the preferred number,) having suitable supportingshafts, are hung one above the other in suitable bearings in the ends of said box, so that they may be rotated by a belt applied to a pulley h on a shaft of one of said rolls, the shafts of the other two rolls being gear-connected to that one bearing said pulley. Thus said three rolls have uniform rotary movements; but the upper and lower rolls F F rotate in opposite or dissimilar directions from the center one. Said three rollshave each of them a series of longitudinal metal blades h, extending from end to end thereof, the outer edges 0 of which project, as shown, beyond the body '5 of the roll, (see Fig. 1,) which body is preferably of wood, in which the inner edges of said blades are inserted, as shown, and said blades are held against end movement by an end plate It, secured against each end of the roll. The said outer edges 0 of said blades are preferably made thinner than the adjoining inner portions, as shown,thereby providing portions for such mutual action against said pulp bunches as best secures the breaking up of said bunches. In

practice the upper and lower rollsv F F are adjusted for rotation so that the edges of the blades thereof shall move very near the edges of the blades of the intermediate roll F, but having no contact therewith. The blades of the center roll F lie parallel with the axis of the latter, and the blades of the top and bottom rolls F have their blades ar ranged in lines diagonal to the axis of said rolls, whereby even though the contiguous edges of the blades of the rolls may be moving in the same direction there will be a shearing action on the pulp passing between them which will tend to draw out the pulp balls or said box D opposite each of said rolls.

bunches and separate the fibers. The abovedescribed diagonal arrangement of the blades of certain of the rolls will cause the pulp in passing between the latter to take a diagonal course, whereby it will be longer subjected to said drawing-out action. Said devices for acting upon the pulp for the purpose aforesaid comprise also one or more knife-bars J, extending longitudinally on the inner walls of Said bars J are each held in a slotted or grooved support 7 suitably secured to said box-walls, in which said bars may have acertain adj ust ing movement toward and from the face of said rolls, which movement is imparted thereto by one or more adjusting screw-bolts nfor each bar, each of which passes through a nut 15, fixed to the outer side of said box, and a set-nut e for each screw-bolt 02, whereby said screws are held against displacement after having been adjusted. Each of said bars J has a longitudinal T-shaped slot in its inner face or side, in which are engaged the inner ends of said screw-bolts u, as shown, whereby such connection of screws and bar is had as permits the free rotation of said screws,whereby by the operation of the latter the bar J is positively moved toward and from said roll or rolls. The face of each of said bars J adjoining said rolls is preferably slightly concaved in accordance with the circle described by the movement of the edges of the rollblades, and said bar-face is longitudinally slotted, as shown, thereby producing on each of said bars asseries of knife-blades m, similar to the edges of said blades 71,. The operative positions of said bars J, carrying the said blade-like ribs m, is one which brings the edges of said ribs out very close to, but not in engagement with, the outer edges of the blades on the said rolls, to the end that the action of the roll-blades and of said ribs 012 upon the pulp bunches shall be substantially like that of the blades of two of said rolls, as above described. Thus it will be seen that the pulp from the screen-box S entering the roll-containing box D through the conduitE will, because of the described arrangement of the rolls and bars J, be caused to follow the course indicated by the arrows .2, which causes it to be exposed three times to the combined action of a roll and bar J and twice to the action of the three blade-carrying rolls, such actions serving to effectually dissipate any bunches contained in the pulp when entering said box D, as described. Upon leaving the last-named box the pulp, as aforesaid, follows the course indicated by the arrows so through said boxv part D and passes through the spout F onto the paper-machine.

Having thus described my invention,what I claim, and desire to secure by Letters Patent, is-

1. The combination with the wire-cloth of a paper-machine and screen-box therefor, of a box located between said wire-cloth and screen-box, a conduit between the latter and the bottom of said box,a series of rolls mounted one above the other'in said box, radial blades on said rolls, knife-bars set adj ustably in close proximity to the edges of said blades, means for rotating contiguous rolls of said series in opposite directions, whereby pulp passing up through said box is made to take a circuitous direction, and an outlet from said box above the surface of said wire-cloth, substantially as described.

2. In combination with the wire-cloth of a paper-machine, and a screen-box for the latter, pulp dressing or evening devices comprising a box located between said wire-cloth and screen-box, through which wet paper-pulp passes on its way to, and before reaching said machine, knife-bars set horizontally in the inner wall of said box, several revoluble rolls supported in said boxin parallelism with said bars for simultaneous rotary movements, cer= tain ones thereof rotating in opposite directions to others, each of said rolls having a series of radially-disposed longitudinal blades, those on one roll being parallel with, and on the next inclined to, the axis of said rolls, whereby pulp in passing between the latter will be given a direction of movement diago nal to said rolls, and means fol-imparting said rotary movements to the rolls, substantially as described.

3. In combination with the wire-cloth of a paper-machine, and a screen-box for said ma chine, of pulp dressing or evening devices comprising a box located between said wirecloth and said screen-box through which pulp passes in an upward direction on its way to said machine, knife-bars set horizontally in the inner wall of said box, several revoluble rolls supported in said boxin parallelism with said bars for simultaneous rotary movement, certain ones of said rolls rotating in opposite directions to others, each of said rolls having a series of radially-disposed longitudinal blades, means for imparting said rotary movements to said rolls, whereby said pulp is made to take a circuitous direction through said box and between the several rolls, and an overflow-outlet from the latter above the said wire-cloth, substantially as described.

4:. In combination with the wire-cloth of a paper-machine, and a screen-box for said machine, of pulp dressing or evening devices comprising a box located between said wirecloth and said screen-box through which pulp passes in an upward direction on its way to said machine, several revoluble rolls supported in said box for simultaneous rotary movements, certain ones of said rolls rotating in opposite directions to others, each of said rolls having a series of radially-disposed 1ongitudinal blades, a series of knife-bars supported on the inner walls of said box, and ad-' justable toward and from said rolls, means for imparting said rotary movements to said rolls, whereby said pulp is made to take a circuitous direction through said box and between the several rolls, and an overflow-outlet from the latter above the said wire-cloth, substantially as described.

I HENRY MELLOR.

Witnesses:

K. I. CLEMoNs,

WM. H. CHAPIN. 

